Service Diagnosis - Daikin SUPER MULTI NX CTXS07JVJU Service Manual

1. Troubleshooting with LED .......................................................................135
2. Problem Symptoms and Measures .........................................................137
3. Service Check Function ..........................................................................138
4. Code Indication on Remote Controller ....................................................144
5. Troubleshooting for Indoor Unit...............................................................146
6. Troubleshooting for Outdoor Unit............................................................156
7. Check ......................................................................................................191
133

Service Diagnosis

1.1 Indoor Unit................................................................................................ 135
1.2 Outdoor Unit ............................................................................................. 136
3.1 ARC452 Series Remote Controller .......................................................... 138
3.2 ARC433 Series Remote Controller .......................................................... 141
4.1 Indoor Unit................................................................................................ 144
4.2 Outdoor Unit ............................................................................................. 145
5.1 Indoor Unit PCB Abnormality ................................................................... 146
5.2 Freeze-up Protection Control or Heating Peak-cut Control...................... 148
5.3 Fan Motor or Related Abnormality ........................................................... 150
5.4 Thermistor or Related Abnormality (Indoor Unit)...................................... 153
5.5 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ........ 154
5.6 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ................. 155
6.1 Refrigerant Shortage ................................................................................ 156
6.2 Low-voltage Detection or Over-voltage Detection.................................... 159
6.3 Signal Transmission Error (on Outdoor Unit PCB) (24/32 Class Only) .... 161
6.4 Unspecified Voltage (between Indoor Unit and Outdoor Unit) /
Anti-icing Function in Other Rooms.......................................................... 162
6.5 Anti-icing Function.................................................................................... 163
6.6 Outdoor Unit PCB Abnormality (24/32 Class Only).................................. 165
6.7 OL Activation (Compressor Overload) ..................................................... 166
6.8 Compressor Lock ..................................................................................... 167
6.9 DC Fan Lock ............................................................................................ 168
6.10 Input Overcurrent Detection ..................................................................... 169
6.11 Four Way Valve Abnormality (18 Class Only) .......................................... 170
6.12 Discharge Pipe Temperature Control....................................................... 172
6.13 High Pressure Control in Cooling ............................................................. 173
6.14 Compressor Sensor System Abnormality (24/32 Class Only).................. 174
6.15 Position Sensor Abnormality .................................................................... 176
6.16 CT or Related Abnormality ....................................................................... 179
6.17 Thermistor or Related Abnormality (Outdoor Unit)................................... 181
6.18 Electrical Box Temperature Rise.............................................................. 183
6.19 Radiation Fin Temperature Rise .............................................................. 186
6.20 Output Overcurrent Detection .................................................................. 189
7.1 Thermistor Resistance Check .................................................................. 191
SiUS12-928_B
Part 6
Service Diagnosis